CN2718904Y - Anti-shunt running circuit with valve value in electric energy metering chip - Google Patents
Anti-shunt running circuit with valve value in electric energy metering chip Download PDFInfo
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- CN2718904Y CN2718904Y CN 200420023775 CN200420023775U CN2718904Y CN 2718904 Y CN2718904 Y CN 2718904Y CN 200420023775 CN200420023775 CN 200420023775 CN 200420023775 U CN200420023775 U CN 200420023775U CN 2718904 Y CN2718904 Y CN 2718904Y
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Abstract
The utility model relates to an anti-shunt running circuit with a valve value in an electric energy metering chip. The utility model is composed of an absolute value module, a comparison module and an output module. One input terminal of the comparison module is connected with the output terminal of the absolute value module. Another input terminal is provided with an anti-shunt running valve value. The control end of the output module is connected with the output terminal of the comparison module. One input terminal of the output module and the input terminal of the absolute value module are connected with the input power value. The other input terminal is connected with data 0. The absolute value module is composed of N doublet addition units and N alternative selecting units. The output terminal of the previous addition unit is connected with the input terminal of the latter addition unit. The output terminals of the addition units are connected with the input terminals of the corresponding selecting units. The comparison module is composed of N doublet addition units. The output module is composed of N alternative selecting units. An anti-shunt running valve value is preset in the chip of the utility model. The anti-shunt running function can be realized through the comparison between the anti-shunt running valve value and the power signal. The utility model is quite simple to be carried out and is very practical.
Description
Technical Field
The utility model relates to an anti-creeping circuit in integrated circuit chip especially relates to the anti-creeping circuit who has the threshold value in the electric energy measurement chip that realizes the electric energy measurement designing requirement with basic unit in the electric energy measurement chip.
Background
In the field of electric energy metering chips, the anti-shunt running means that the electric energy metering chip has no output under the condition of no current and voltage input.
However, in the chip for measuring electric energy in the prior art, both the chip itself and the whole meter system of the electric meter generate inevitable noise, so that when the electric meter is not used, due to the existence of the noise, the micro-signal resolution error of the circuit is accumulated, so that the effective power counting is caused, and the unnecessary loss of electric power is caused to a user.
Therefore, in the field of electric energy metering chips, the setting of the anti-shunt function of the chip is imperative, so that the required electric energy metering chip has no output under the condition of no current and voltage input, and the unnecessary loss caused to users is reduced.
Disclosure of Invention
An object of the utility model is to provide an it can realize the anti-creeping function of designing requirement in the electric energy measurement chip of anti-creeping circuit that has the threshold value in the electric energy measurement chip.
The purpose of the utility model is realized like this:
an anti-shunt running circuit with threshold value in an electric energy metering chip is characterized by comprising:
an absolute value module;
one input end of the comparison module is connected with the output end of the absolute value module, and the other input end of the comparison module is provided with an anti-creeping threshold value;
the control end of the output module is connected with the output end of the comparison module, one input end and the input end of the absolute value module are connected with the input power value in a common mode, and the other input end is connected with the data '0';
the absolute value module is formed by connecting N two-bit addition units and N one-out-of-two selection units, wherein in the N two-bit addition units, the output end of the previous-stage addition unit is connected with the input end of the next-stage addition unit, and the output end of each addition unit is connected with the input end of the corresponding selection unit;
the comparison module consists of N two-bit addition units;
the output module is composed of N alternative selection units.
In the anti-creeping circuit with the threshold value in the electric energy metering chip, the absolute value module is formed by connecting N two-bit addition units and N two-out-of-one selection units; wherein,
IN the N two-bit addition units, N-bit bus data IN < N-1:0> input by the module are respectively connected to the input end a1 of each addition unit through an inversion unit; the input end "a 2" of each addition unit is connected with data "0"; the input end "a 3" of the addition unit 0 is connected with data "1", and the output end of the previous addition unit is connected with the input end of the next addition unit; the output's' end of each adding unit is connected to the input 'A' end of the corresponding selecting unit;
IN the N alternative selection units, N-bit bus data IN < N-1:0> input by the module are respectively connected to the input 'B' ends of the selection units; the highest bit IN < N-1> of the module input N-bit bus data is connected to the S end of the selection control input of the N selection units; the input 'A' end of each selection unit is connected with the output's' end of each corresponding addition unit; the output Y end of each selection unit is connected to the corresponding module to output N-bit bus data 0UT < N-1:0 >.
In the anti-creeping circuit with the threshold value in the electric energy metering chip, the comparison module consists of N two-bit addition units; the module input N-bit bus data CL < N-1:0> are respectively connected to the input 'a 1' ends of the addition units through the inversion units; the module input N-bit bus data IN < N-1:0> is connected to the input 'a 2' end of the corresponding addition unit; the input end "a 3" of the addition unit 0 is connected with data "1", and the output end of the previous addition unit is connected with the input end of the next addition unit; the carry output 'c' end of the addition unit N-1 is output by the module, and a FLAG signal 'FLAG' of the comparison result is output.
In the anti-creeping circuit with the threshold value in the electric energy metering chip, the output module consists of N alternative selection units; n-bit bus data IN < N-1:0> input by the module are respectively connected to the input 'A' end of the selection unit; the module input FLAG is connected to the selection control input 'S' ends of the N selection units; the input 'B' end of each selection unit is connected with data '0'; the output Y end of each selection unit is connected to the corresponding module to output N-bit bus data 0UT < N-1:0 >.
The utility model relates to an electric energy measurement chip has the anti-creeping circuit of threshold value owing to adopted foretell technical scheme, makes it compare with prior art, has following advantage and positive effect:
1. the utility model adopts the combined circuit composed of the absolute value module, the comparison module and the output module, thereby not only realizing the anti-shunt running function required by the electric energy metering design in the electric energy metering chip, but also having simple structure and easy realization;
2. the utility model discloses owing to predetermine an anti-creeping threshold value in the chip, output the numerical value of representative power when power absolute value more than or equal to anti-creeping threshold value, and output data "zero" when power absolute value is less than anti-creeping threshold value, neglected promptly, guaranteed the anti-creeping function of electric energy measurement chip on the threshold value to the accumulation of the micro-signal resolution error of circuit has been avoided.
Drawings
The objects, specific structural features, and advantages of the present invention will be further understood from the following description of an embodiment of an anti-dive circuit having a threshold value in an electric energy metering chip according to the present invention, in conjunction with the accompanying drawings. Wherein, the attached drawings are as follows:
fig. 1 is a schematic diagram of a circuit block structure of an anti-creeping circuit having a threshold in an electric energy metering chip according to the present invention;
FIG. 2 is a schematic diagram of the absolute value block of FIG. 1;
FIG. 3 is a schematic circuit diagram of the comparison module of FIG. 1;
fig. 4 is a schematic circuit diagram of the output module of fig. 1.
Detailed Description
Fig. 1 is a schematic diagram of a block circuit structure of an anti-creeping circuit having a threshold in an electric energy metering chip according to the present invention. In order to realize the anti-dive function of electric energy measurement chip, the utility model discloses anti-dive circuit comprises absolute value module 10, comparison module 20 and output module 30. One input end of the comparison module 20 is connected with the output end of the absolute value module 10, and the other input end is provided with an anti-shunt threshold; the control end of the output module 30 is connected with the output end of the comparison module 20; one input end of the output module 30 and the input end of the absolute value module 10 are connected to the input power value in common, and the other input end is connected to the data "0".
Fig. 2 is a schematic structural diagram of an absolute value module in an anti-sneak circuit with a threshold in an electric energy metering chip according to the present invention, and is shown in fig. 1. The absolute value module 10 is formed by connecting N two-bit adding units and N one-out-of-two selecting units, wherein in the N two-bit adding units, the output end of the previous-stage adding unit is connected with the input end of the next-stage adding unit, and the output end of each adding unit is connected with the input end of the corresponding selecting unit. As shown in fig. 2, in the embodiment taking 4-bit data processing as an example, in the embodiment, the absolute value module 10 is formed by connecting 4 two-bit adding units and 4 one-out-of-two selecting units, and if N-bit data processing is performed, N two-bit adding units and N one-out-of-two selecting units are used, and so on.
IN the 4 two-bit addition units of the embodiment, 4-bit bus data IN <3:0> input by the module are respectively connected to the input end 'a 1' of each addition unit through an inversion unit, wherein the lowest IN <0> of the 4-bit bus data is connected to the addition unit 0, IN <1> is connected to the addition unit 1, IN <2> is connected to the addition unit 2, and the highest IN <3> of the 4-bit bus data is connected to the addition unit 3; the input end "a 2" of each addition unit is connected with data "0"; the input end "a 3" of the adding unit 0 is connected with the data "1", the output end of the adding unit of the previous stage is connected with the input end "a 3" of the adding unit of the next stage, namely, the output end "c" of the adding unit 0 is connected with the input end "a 3" of the adding unit 1, the output end "c" of the adding unit 1 is connected with the input end "a 3" of the adding unit 2, and the output end "c" of the adding unit 2 is connected with the input end "a 3" of the adding unit 3; the output "s" end of each adding unit is connected to the input "A" end of the corresponding selecting unit.
IN the 4-bit alternative selection unit of the embodiment, 4-bit bus data IN <3:0> input by the module are respectively connected to the input 'B' end of the selection unit, wherein the lowest bit IN <0> of the 4-bit bus data is connected to the selection unit 0, IN <1> is connected to the selection unit 1, IN <2> is connected to the selection unit 2, and the highest bit IN <3> of the 4-bit bus data is connected to the selection unit 3; the highest bit IN <3> of the module input 4-bit bus data is connected to the S end of the selection control input of the 4 selection units; the input 'A' end of each selection unit is connected with the output's' end of each corresponding addition unit; the output Y end of each selection unit is connected to the corresponding module output 4-bit bus data 0UT <3:0>, wherein the output Y end of the selection unit 0 is connected to the lowest bit OUT <0> of the 4-bit bus data, the output Y end of the selection unit 1 is connected to the 4-bit bus data OUT <1>, the output Y end of the selection unit 2 is connected to the 4-bit bus data OUT <2>, and the output Y end of the selection unit 3 is connected to the highest bit OUT <3> of the 4-bit bus data.
Referring to fig. 3 in conjunction with fig. 1 and fig. 2, fig. 3 is a schematic structural diagram of a comparison module in an anti-creeping circuit with a threshold in an electric energy metering chip according to the present invention. The comparison module 20 is composed of N two-bit addition units; as shown in fig. 3, in the embodiment taking 4-bit data processing as an example, in the present embodiment, the comparison module 20 is composed of 4 two-bit addition units, and if N-bit data processing is performed, N two-bit addition units are used, and so on. In the embodiment, of the 4 two-bit addition units constituting the comparison module 20, the module input 4-bit bus data CL <3:0> is respectively connected to the input "a 1" ends of the addition units through inversion units, wherein CL <0> is connected to the addition unit 0 through the inversion unit, CL <1> is connected to the addition unit 1 through the inversion unit, CL <2> is connected to the addition unit 2 through the inversion unit, and CL <3> is connected to the addition unit 3 through the inversion unit; the module input 4-bit bus data IN <3:0> is connected to the input "a 2" terminal of the corresponding adding unit, wherein IN <0> is connected to adding unit 0, IN <1> is connected to adding unit 1, IN <2> is connected to adding unit 2, and IN <3> is connected to adding unit 3; the input end "a 3" of the adding unit 0 is connected with the data "1", the output end of the adding unit of the previous stage is connected with the input end "a 3" of the adding unit of the next stage, namely, the output end "c" of the adding unit 0 is connected with the input end "a 3" of the adding unit 1, the output end "c" of the adding unit 1 is connected with the input end "a 3" of the adding unit 2, and the output end "c" of the adding unit 2 is connected with the input end "a 3" of the adding unit 3; the carry output 'c' end of the addition unit 3 is the module output, and the FLAG signal 'FLAG' of the comparison result is output.
Referring to fig. 4 in conjunction with fig. 1 and fig. 3, fig. 4 is a schematic structural diagram of an output module in an anti-creeping circuit having a threshold in an electric energy metering chip according to the present invention. The output module 30 is composed of N alternative selection units; as shown in fig. 4, in the embodiment taking 4-bit data processing as an example, in the present embodiment, the comparison module 30 is composed of 4 two-bit addition units, and if N-bit data processing is performed, N two-bit addition units are used, and so on. IN the 4-bit alternative selection unit of the embodiment, 4-bit bus data IN <3:0> input by the module are respectively connected to the input 'A' ends of the selection units, wherein the lowest bit IN <0> of the 4-bit bus data is connected to the selection unit 0, IN <1> is connected to the selection unit 1, IN <2> is connected to the selection unit 2, and the highest bit IN <3> of the 4-bit bus data is connected to the selection unit 3; the comparison module outputs a FLAG signal 'FLAG' to be connected to the selection control input 'S' ends of the 4 selection units; the input "B" of each selection unit terminates the data "0"; the output Y end of each selection unit is connected to the corresponding module output 4-bit bus data 0UT <3:0>, wherein the output Y end of the selection unit 0 is connected to the lowest bit OUT <0> of the 4-bit bus data, the output Y end of the selection unit 1 is connected to the 4-bit bus data OUT <1>, the output Y end of the selection unit 2 is connected to the 4-bit bus data OUT <2>, and the output Y end of the selection unit 3 is connected to the highest bit OUT <3> of the 4-bit bus data.
The operation of the anti-creeping circuit with a threshold in the electric energy measuring chip of the present invention will be described below.
Just the utility model discloses a circuit of whole anti-creeping module, through the comparison to input signal and threshold value decide the output of circuit:
firstly, an absolute value of a power value input into the whole anti-creeping module is obtained, and an absolute value of input power is obtained by passing an input power signal through the absolute value module. Because the input power value is positive and negative, the input power value is represented by a complementary code in the signal processing process, namely the highest bit is 0 to represent a positive value, and the highest bit is 1 to represent a negative value. In the case of 4-bit data processing, 0101 indicates +5, and 1011 indicates-5. The selection unit in the absolute value module 10 determines whether the most significant bit of the input 4-bit data is "0" or "1" and outputs the determined value, thereby obtaining the absolute value of the input 4-bit data. If the most significant bit is '0', the input data is directly output without conversion; if the highest bit is '1', the number is inverted and added with one to obtain the positive number, and then the positive number is output. For example, inverting 4-bit data "1011" (-5) to obtain "0100", and adding one to obtain "0101", i.e., +5, obtains the absolute value of the input power.
The absolute value of the input power is then compared to a preset anti-submarine valve value at a comparison module 20. The two numbers are subtracted to compare the two numbers, that is, the preset anti-creeping valve value is inverted and added again and again to the power absolute value, if the power absolute value is greater than or equal to the anti-creeping threshold value, the comparison module 20 outputs a FLAG 'FLAG' as a high level '1'; if the absolute value of the power is smaller than the anti-shunt threshold value, the comparison module outputs a FLAG 'FLAG' as a low level '0'. Taking 4-bit data as an example, if the anti-creeping threshold value is '0101' (+5), negation is carried out to obtain '1010', then one is added to obtain '1011', if the absolute value of power is '0100' (+4), the two are added to obtain '1111', no carry exists, the absolute value of power is smaller than the anti-creeping threshold value, and the comparison module outputs a FLAG 'FLAG' to be low level '0'; similarly, if the anti-creeping threshold value is '0101' (+5), negation is performed to obtain '1010', then a negative result is added to obtain '1011', if the absolute value of the power is '0110' (+6), the two are added to obtain '10001', a carry is generated to indicate that the absolute value of the power is greater than or equal to the anti-creeping threshold value, and the comparison module outputs a FLAG 'FLAG' to be a high level '1'.
The FLAG signal 'FLAG' of the comparison result is obtained, and the output module 30 determines the output of the entire anti-sneak circuit according to the FLAG. That is, if "FLAG" is high level "1", the input power data is output; if the FLAG is low level 0, the output data is zero, and no signal is sent to the next module.
To whole electric energy measurement chip, the utility model discloses prevent that dive circuit's that has the threshold effect is:
the electric energy metering chip needs to complete the anti-shunt function, namely, the chip does not output under the condition that the electric energy metering chip does not input current and voltage. Therefore, the value of the anti-creeping valve preset in the chip is generally far smaller than the absolute value of the power of the chip in normal operation.
When the chip works normally, the power value input into the anti-creeping module is larger than the set threshold value, and the actual power value is output by the output module 30; when the chip has no input, the power value input into the absolute value module 10, or the inevitable noise generated by the chip itself and the whole meter system, will be smaller than the set threshold, which indicates that the input power value belongs to the accumulation of the micro signal resolution error of the circuit, and the output module 30 outputs a value of "zero", i.e. no signal is sent to the next module, and the power value is not counted as the power value in normal operation.
Like this, predetermine an anti-creeping threshold value in the chip, pass through when the signal that shows power the utility model discloses when preventing creeping circuit, move threshold value and power signal comparison with predetermineeing anti-creeping, realize the anti-creeping function of the electric energy measurement designing requirement in the electric energy measurement chip. To sum up, the utility model relates to an electric energy measurement chip has threshold value prevent dive circuit owing to predetermine an anti-dive threshold value in the chip, through preventing dive threshold value and power signal comparison, not only realize the anti-dive function of electric energy measurement designing requirement to use simple structure and easily realization in the electric energy measurement chip, consequently very practical.
Claims (4)
1. An anti-creeping circuit having a threshold value in an electric energy metering chip, comprising:
an absolute value module (10);
one input end of the comparison module (20) is connected with the output end of the absolute value module (10), and the other input end of the comparison module (20) is provided with an anti-shunt threshold value;
the control end of the output module (30) is connected with the output end of the comparison module (20), one input end and the input end of the absolute value module (10) are connected with the input power value in a shared mode, and the other input end is connected with the data '0';
the absolute value module (10) is formed by connecting N two-bit addition units and N two-out-of-one selection units, wherein in the N two-bit addition units, the output end of the previous-stage addition unit is connected with the input end of the next-stage addition unit, and the output end of each addition unit is connected with the input end of the corresponding selection unit;
the comparison module (20) consists of N two-bit addition units;
the output module (30) is composed of N alternative selection units.
2. The anti-creeping circuit having a threshold in an electric energy metering chip according to claim 1, wherein: the absolute value module (10) is formed by connecting N two-bit addition units and N one-out-of-two selection units; wherein,
IN the N two-bit addition units, the N-bit bus data IN < N-1:0> is respectively connected to the input end 'a 1' of each addition unit through an inversion unit; the input end "a 2" of each addition unit is connected with data "0"; the input end "a 3" of the addition unit 0 is connected with data "1", and the output end of the previous addition unit is connected with the input end of the next addition unit; the output's' end of each adding unit is connected to the input 'A' end of the corresponding selecting unit;
IN the N alternative selection units, the N-bit bus data IN < N-1:0> are respectively connected to the input 'B' ends of the selection units; the highest bit IN < N-1> of the module input N-bit bus data is connected to the S end of the selection control input of the N selection units; the input 'A' end of each selection unit is connected with the output's' end of each corresponding addition unit; the output "Y" end of each selection unit is connected to the corresponding module output N-bit bus data 0UT < N-1:0 >.
3. The anti-creeping circuit having a threshold in an electric energy metering chip according to claim 1, wherein: the comparison module (20) consists of N two-bit addition units;
module input N-bit bus data CL < N-1:0> are respectively connected to the input 'a 1' ends of the addition units through the inversion units; module inputs N-bit bus data IN < N-1:0> is connected to the input "a 2" end of the corresponding addition unit; the input end "a 3" of the addition unit 0 is connected with data "1", and the output end of the previous addition unit is connected with the input end of the next addition unit; the carry output 'c' end of the addition unit N-1 is output by the module, and a FLAG signal 'FLAG' of the comparison result is output.
4. The anti-creeping circuit having a threshold in an electric energy metering chip according to claim 1, wherein: the output module (30) consists of N alternative selection units;
module input N-bit bus data IN < N-1:0> are respectively connected to the input 'A' ends of the selection units; the module input FLAG is connected to the selection control input 'S' ends of the N selection units; the input 'B' end of each selection unit is connected with data '0'; the output "Y" end of each selection unit is connected to the corresponding module output N-bit bus data 0UT < N-1:0 >.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420023775 CN2718904Y (en) | 2004-06-16 | 2004-06-16 | Anti-shunt running circuit with valve value in electric energy metering chip |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200420023775 CN2718904Y (en) | 2004-06-16 | 2004-06-16 | Anti-shunt running circuit with valve value in electric energy metering chip |
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| CN2718904Y true CN2718904Y (en) | 2005-08-17 |
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| CN 200420023775 Expired - Lifetime CN2718904Y (en) | 2004-06-16 | 2004-06-16 | Anti-shunt running circuit with valve value in electric energy metering chip |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425994C (en) * | 2006-12-06 | 2008-10-15 | 北京中星微电子有限公司 | Circuit and method for preventing shunt running in electric energy measurement |
| CN100425995C (en) * | 2006-12-06 | 2008-10-15 | 北京中星微电子有限公司 | Circuit and method for preventing shunt running in electric energy measurement |
| CN101191802B (en) * | 2006-12-01 | 2010-09-15 | 上海贝岭股份有限公司 | Electric energy metering chip creeping prevention method |
| CN103149397A (en) * | 2013-03-01 | 2013-06-12 | 深圳市芯海科技有限公司 | Electric energy metering creeping algorithm and control circuit |
| CN103713189A (en) * | 2013-12-31 | 2014-04-09 | 上海贝岭股份有限公司 | Power shunt running quick detection circuit |
| CN109471058A (en) * | 2018-09-29 | 2019-03-15 | 国网浙江省电力有限公司金华供电公司 | A kind of field-checking measurement error system and method |
-
2004
- 2004-06-16 CN CN 200420023775 patent/CN2718904Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191802B (en) * | 2006-12-01 | 2010-09-15 | 上海贝岭股份有限公司 | Electric energy metering chip creeping prevention method |
| CN100425994C (en) * | 2006-12-06 | 2008-10-15 | 北京中星微电子有限公司 | Circuit and method for preventing shunt running in electric energy measurement |
| CN100425995C (en) * | 2006-12-06 | 2008-10-15 | 北京中星微电子有限公司 | Circuit and method for preventing shunt running in electric energy measurement |
| CN103149397A (en) * | 2013-03-01 | 2013-06-12 | 深圳市芯海科技有限公司 | Electric energy metering creeping algorithm and control circuit |
| CN103149397B (en) * | 2013-03-01 | 2016-02-24 | 深圳市芯海科技有限公司 | A kind of electric energy metrical shunt running algorithm and control circuit |
| CN103713189A (en) * | 2013-12-31 | 2014-04-09 | 上海贝岭股份有限公司 | Power shunt running quick detection circuit |
| CN109471058A (en) * | 2018-09-29 | 2019-03-15 | 国网浙江省电力有限公司金华供电公司 | A kind of field-checking measurement error system and method |
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Expiration termination date: 20140616 Granted publication date: 20050817 |